The intellectual tradition that holds there is an objective moral order built into the structure of reality, accessible through human reason, that any legitimate human law must conform to. Aristotle and the Stoics laid the early foundations; Aquinas developed natural law into its most influential systematic form by synthesizing Aristotelian philosophy with Christian theology. Natural law thinking still anchors contemporary Catholic political and legal philosophy, and secularized versions have shaped human rights theory and international law.
Natural Law
The tradition that holds there are objective moral and political truths grounded in human nature, accessible to reason, and binding regardless of what particular societies happen to believe.
Harry Jaffa
Harry Jaffa was a Straussian conservative philosopher who reinterpreted Lincoln and the American Founding as a principled defense of natural right, shaping the West Coast school that still informs the intellectual right
ThinkerHarriet Tubman
1822–1913
Harriet Tubman was an abolitionist who escaped slavery and led some 70 enslaved people to freedom on the Underground Railroad, later serving as a Union spy and supporting women's suffrage
ThinkerAristotle
384–322 BCE
Aristotle was the ancient Greek founder of political science, grounding politics in the conviction that humans are by nature political animals who flourish only in community
ThinkerMarcus Tullius Cicero
106–43 BCE
Marcus Tullius Cicero was a Roman statesman and defender of the Republic whose synthesis of Greek philosophy and Roman civic life became one of the most influential models of republican political thought in the West
ThinkerFrederick Douglass
1818–1895
Frederick Douglass was an abolitionist and natural-rights political philosopher who read the Constitution as an anti-slavery document and became the most influential African American intellectual of the 19th century
ThinkerJohn Calvin
1509–1564
John Calvin was the most politically consequential Protestant Reformer, whose theology of resistance, vocation, and godly civil government shaped Puritan England, colonial America, and the modern Protestant world
ThinkerLysander Spooner
1808–1887
Lysander Spooner was an American abolitionist and individualist anarchist whose case against slavery and the Constitution's authority founded the tradition running through Rothbard to anarcho-capitalism
ThinkerThomas Aquinas
1225–1274
Thomas Aquinas was the medieval Dominican friar who synthesized Christian theology with Aristotelian philosophy and built the natural law tradition that still anchors Catholic political thought
ThinkerAbraham Lincoln
1809–1865
Abraham Lincoln was the antislavery president whose arguments about consent, equality, and the meaning of the founding remain the deepest engagement with American democratic theory ever produced
ThinkerMartin Luther King Jr.
1929–1968
Martin Luther King Jr. was the minister and political philosopher who fused Gandhian nonviolence, Christian personalism, and American democratic ideals into the most morally serious political movement of the twentieth century
ThinkerHugo Grotius
1583–1645
Hugo Grotius was the Dutch natural-law jurist called the father of international law, whose On the Law of War and Peace grounded rights and obligations in reason for a Europe fractured by religious war
ThinkerCésar Chávez
1927–1993
César Chávez was a nonviolent labor leader who combined union organizing with civil rights activism and Catholic social teaching to win contracts and legal protections for America’s farm workers
ThinkerEleanor Roosevelt
1884–1962
Eleanor Roosevelt was a Democratic champion of civil and human rights who remade the First Ladyship into a political force and chaired the drafting of the Universal Declaration of Human Rights
ThinkerRosa Parks
1913–2005
Rosa Parks was a trained civil rights activist whose deliberate refusal to give up her Montgomery bus seat sparked the boycott that launched the modern civil rights struggle
ThinkerC.S. Lewis
1898–1963
Christian apologist, Narnia author, moral law
ThinkerWalter Rauschenbusch
1861–1918
Walter Rauschenbusch was the Baptist founder of the Social Gospel, whose eleven years in Hell's Kitchen convinced him that poverty was structural rather than spiritual — and that the church was obliged to say so
ThinkerJoseph de Maistre
1753–1821
Joseph de Maistre was the godfather of European counter-revolutionary thought, arguing that the French Revolution proved liberalism false and that tradition, faith, and the executioner were the real foundations of order
ThinkerDorothy Day
1897–1980
Dorothy Day was a radical Catholic pacifist whose Catholic Worker movement fed the hungry, housed the homeless, and refused any distinction between personal holiness and political transformation
ThinkerMarcus Aurelius
121–180
Marcus Aurelius was Rome's Stoic philosopher-emperor, ruling the most powerful state in the world while writing a private journal on how to live well — the Meditations, among the most widely read texts in human history
ThinkerMartin Luther
1483–1546
Martin Luther was the Augustinian monk whose protest against indulgences fractured Western Christendom and whose insistence on conscience over ecclesiastical authority set the terms of political debate for centuries
ThinkerRussell Kirk
1918–1994
Russell Kirk was the traditionalist conservative who gave the postwar American right its intellectual soul, defending tradition, order, and the permanent things against modern ideological abstraction
ThinkerMahatma Gandhi
1869–1948
Mahatma Gandhi was the Indian independence leader who transformed nonviolent resistance from a personal moral stance into a systematic political philosophy — and demonstrated that it could defeat an empire
